EP0659523B1 - Vorrichtung zum Sandstrahlen von Flächen, die von einer geraden Sandstrahlkanalisation nicht zugänglich sind - Google Patents

Vorrichtung zum Sandstrahlen von Flächen, die von einer geraden Sandstrahlkanalisation nicht zugänglich sind Download PDF

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Publication number
EP0659523B1
EP0659523B1 EP94402963A EP94402963A EP0659523B1 EP 0659523 B1 EP0659523 B1 EP 0659523B1 EP 94402963 A EP94402963 A EP 94402963A EP 94402963 A EP94402963 A EP 94402963A EP 0659523 B1 EP0659523 B1 EP 0659523B1
Authority
EP
European Patent Office
Prior art keywords
shot
blasting
duct
sleeve
propulsion means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94402963A
Other languages
English (en)
French (fr)
Other versions
EP0659523A1 (de
Inventor
Régis Guy Brunier
Stéphane Michel Kerneis
Dominique Jean Cotto
Michel François Franck Silvestrelli
Richard Gaston Abel Joly
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
Lexvall SA
Original Assignee
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
SNECMA SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA, SNECMA SAS filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of EP0659523A1 publication Critical patent/EP0659523A1/de
Application granted granted Critical
Publication of EP0659523B1 publication Critical patent/EP0659523B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/18—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions
    • B24C3/20—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions the work being supported by turntables
    • B24C3/22—Apparatus using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes

Definitions

  • the invention relates to treatment mechanical by blasting surfaces with difficulty accessible, for example internal cavities of a container or relatively shaped interior object complex.
  • the invention applies more particularly to the final treatment of surfaces of the interior of a turbojet rotor.
  • Shot blasting consists of projecting very high speed metal balls with a diameter of in the range of 0.2 to 0.6 mm. Such hammering allows to obtain the expected surface treatment.
  • the rotor of a turbojet engine has inside a large number of radial grooves, called stiffeners which form a large number of annular internal cavities that it is also necessary to blast.
  • stiffeners which form a large number of annular internal cavities that it is also necessary to blast.
  • the difficulty of setting work of this operation forced the builders to turbomachines to design such rotors in several parts, so that you can have access to the surfaces internal to be treated by shot blasting. It follows a lack of structural homogeneity of the rotor.
  • the main object of the invention is to allow the construction of a turbomachine rotor by one piece while allowing the shot blasting of all internal surfaces to be treated by this process.
  • the shot blasting technique consists of project metal balls at very high speed by means of one or more compressed air sources at high pressure.
  • the balls are thus transported in pipes leading to a terminal nozzle of projection.
  • the slightest change of direction along the flow path high pressure propelled balls in the pipeline constitutes a significant pressure drop and power.
  • the performance of the installation of shot peening is therefore dependent on this type of pitfall.
  • the internal cavities of a turbomachine rotor do not are not accessible via a straight pipe. In indeed, they are not visible. They don't are accessible only through the central rotor channel on which each of these cavities opens. In others terms, the internal cavities of a turbomachine rotor are practically not accessible to shot blasting of sufficient power.
  • the shot blasting line (s) should therefore avoid making changes brutal management. It is the same for the nozzle of projection that we may have to predict with a deflection surface, called projection anvil, depending on the position and orientation of the surfaces to treat.
  • the fixing of the shot blasting pipe at the outlet of means of propulsion is obtained on the sleeve by a lockable bayonet mount and unlockable, to allow rapid disassembly of this pipeline.
  • the nozzle is temporarily fixed by screwing, to can be changed at will depending on the orientation surfaces to be shot blasted.
  • the device can advantageously be supplemented by a pressure screw to slow down or block rotation of the turbine.
  • the first two and the third compressed air line are kept substantially parallel until the means propulsion by means of at least one rigid column.
  • the device according to the invention comprises a foot fixed on a displacement axis integral with a shot blasting machine on the horizontal turntable which the workpiece is fixed so that the shot blasting pipe is located horizontally introduced into an internal toric space of the rotor shot blasting machine.
  • Figure 1 shows a rotor 10 of turbojet engine mounted on the horizontal turntable 2 a shot blasting machine 1.
  • This rotor 10 is therefore driven by a rotational movement around a vertical axis 3 of the shot blasting machine in order to subject all internal surfaces of rotor 10 the treatment of shot blasting.
  • radial ribs 12 being positioned horizontally inside the rotor 10. They constitute stiffeners necessary for holding rotor mechanics 10. They define cavities interior 11 whose walls are therefore shot blasting. It can be seen that these cavities 11 are inaccessible directly and that any element in front working inside these must form a elbow to be able to access it.
  • the shot blasting device is equipped with a foot 4 supporting a horizontal bracket 5.
  • This leg 4 is fixed on an axis of displacement 4A of the shot blasting machine 1. It allows to install the blasting system coaxially to the vertical axis 3 of the shot blasting machine 1.
  • the system according to the invention has been symbolized by a vertical column 6, fixed to the gallows 5 and inside which are introduced supply lines for the shot blasting.
  • a first supply line in shot 7 is shown, as well as one of compressed air supply lines 8.
  • the operational part of the shot blasting according to the invention is symbolized by the lower end of column 6 supporting a blasting line 9 directed inwards of a cavity 11. It is understood that a rotation of the plate horizontal 2 carrying the rotor 10 relative to this shot blasting line 9 around the vertical axis 3 makes it possible to project inside a cavity 11 the shot blasting on 360 ° and thus treat such 11 complete annular cavity, one movement additional rotation of the pipeline from shot peening 9 around its horizontal axis being deputy, as detailed below.
  • FIG. 2 is a half-section of the rotor 10 of FIG. 1, different shot projection nozzles are used.
  • a first nozzle 20 is used to project the shot in the corners 13 distant from the axis 3.
  • This first nozzle 20 has an anvil 20A equipped an inclined surface to deflect the shot of shot, in cooperation with an inclined pipe 20B of this same nozzle 20.
  • a second anvil 21 has been shown mounted on the shot blasting line 9 for treating corners close to the axis 3 of the cavity 11.
  • a anvil 21A different from the first 20A, is used. Indeed, it has a convex surface allowing to push the shot towards the corners 14 by means of at least one inclined pipe 20B in direction of these corners 14 close to the axis 3.
  • We specifies that the performance of such an anvil is lower than the previous one, given the fact of the sharp change in direction of the flow of shot, consuming a lot of energy.
  • a third projection nozzle 22 has been shown with two side pipes 22B for projecting shot perpendicular to the side surfaces 15 of this cavity 11. It also uses an anvil 22A cooperating with the two lateral pipes 22B.
  • the lower cavity 11 is shown with a 9A shot blasting pipe terminated by a nozzle-shaped part 9B allowing projection without deviation of the flow of shot. It allows the treatment of the extreme surface 16 of the cavity 11.
  • the projection nozzles 20, 21, 22 are temporarily mounted by screwing around the shot blasting pipe 9. This fixing can be protected by a sleeve 23.
  • the means of shot propulsion consist of a device which propels it in one direction oriented coaxially to that of the interior of the shot blasting line 9.
  • the shot is brought by a supply line 7 shown vertical and coaxial with the vertical axis 3 of the plate 2 of the shot blasting machine 1 of figure 1. It must then be projected horizontally from Figure 3. It therefore undergoes a change of direction which is located in a bend 24 inside a body 25.
  • One of the two supply lines in compressed air 8, intended for propelling the shot, is shown on the right of the figure. It is brought parallel to the pipeline feed with shot 7, but ends with a 8A elbow opening at the elbow 24 of the body 25, in the extension of the internal pipe 26 placed at the outlet of the elbow 24.
  • the compressed air projects the shot descending from the supply line 7 by elbow 24, in the direction of the pipe shot blasting 9, and this at high speed.
  • the energy communicated by the gas under high pressure is entirely with shot, once it crossed the change of direction constituted mainly through the elbow 24 of the body 25. This energy is therefore fully communicated to the shot entering the shot-blasting line 9 terminated by the projection nozzle.
  • the shot blasting line 9 is fixed on the body 25 by means of a sleeve 27.
  • This fixing is preferably carried out by a bayonet system diagrammed by two nipples 28 fixed in this sleeve 27 and protruding in a groove 29 of line 9.
  • the fixing the shot blasting pipe 9 requires the introduction of two grooves 29 each around a nipple 28 and the rotation of the pipe of shot peening 9 around its vertical axis until set in abutment of the assembly in a final position of fixation.
  • the shot blasting line 9 is assembled and disassembled quickly and easily. This allows a quick change of shot blasting lines 9 for using shot blasting pipes of different lengths. Indeed, as illustrated in FIG. 2, the cavities 11 are relatively wide radially and require several radial positions of the projection nozzles, therefore several shot blasting pipes.
  • the sleeve 27 is rotatably mounted on the support 25 by means of roller bearings 30.
  • this pipe shot peening 9 is thus rotatably mounted.
  • all projection nozzles can eject the shot in all directions around of the horizontal axis 33 of the pipeline of shot blasting 9.
  • the rotational drive of the entire sleeve 27-shot blasting line 9-nozzle projection can be done by means of a third additional compressed pipe 31.
  • the end output 31A of the latter is then positioned opposite the fins 32 of a turbine secured to the sleeve 27.
  • Figure 5 makes it easier to explain these means for rotating the pipe of shot peening 9. Indeed, we find in this figure 5 the fins 32 of the turbine and the end 31A of the third compressed air line 31. We have also shown, for information only, the two first compressed air lines 8 bringing the shot propelling power.
  • the output end 31A of the third compressed air line 31 is offset from to the axis of symmetry of the system and at the same time by relative to the axis of rotation 33 of the turbine.
  • this is also the axis of rotation of the shot blasting line 9 and sleeve 27 of the figure 3.
  • turbine rotation is opposite to the mounting direction of the shot-blasting pipe 9 in the sleeve 27. This avoids unexpected dismantling of the shot blasting lines 9 and ensuring their stay in this position.
  • a screw pressure 34 can be used to act by screwing on the speed of rotation of the turbine. Indeed, this can be caused to rub against a surface radial 35 of the turbine. It is thus possible to block the rotation of the sleeve 27, in order to proceed with the assembly or disassembly of a pipeline shot blasting. It is also possible to use this adjusting screw 34 to vary the speed of turbine rotation.
  • Installation required for the application of such a system preferably requires the use an additional air supply to blow the shot which accumulates inside the cavities treat. It is reported that it is also possible to vacuum it to proceed with this evacuation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cleaning In General (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Claims (6)

  1. Vorrichtung zum Kugelstrahlen durch Ausstroßen von Strahlmittel unter Druck auf Flächen, die mit einer geraden Rohrleitung nicht zugänglich sind und eine abrupte Richtungsänderung des Strahlmittelstroms erfordern, bestehend aus :
    einer Strahlmittel-Versorgungsleitung (7),
    Druckluft-Hochdrucktreibmitteln (8), die am Ausgang der Versorgungsleitung (7) befestigt sind,
    einer Kugelstrahl-Rohrleitung (9), die das Strahlmittel unter Druck auf die zu strahlenden Flächen (13, 14, 15, 16) bringt, und die an den Treibmitteln befestigt ist, und
    einer Ausstoßdüse (20, 21, 22), die am Ende der Kugelstrahl-Rohrleitung (9) angebracht ist,
    dadurch gekennzeichnet, daß :
    die Kugelstrahl-Rohrleitung (9) geradlinig ist,
    die Treibmittel aus zwei ersten Druckluft-Hochdruckleitungen (8) bestehen, die beiderseits eines Kniestücks (24) an dessen Auslaß münden, wobei letzteres an seinem Einlaß die Strahlmittel-Versorgungsleitung (7) aufnimmt, wobei die abrupte Richtungsänderung des Strahlmittelstroms in dem Kneistück (24) vor der Verbindung mit den Druckluftzufuhr-Hochdruckleitungen (8) stattfindet, so daß die Treibenergie dem Strahlmittel erst am Einlaß der geradlinigen Kugelstrahl-Rohrleitung (9), die direkt in die Ausstoßdüse (20, 21, 22) mündet, zugeführt wird,
    die Befestigung der Kugelstrahl-Rohrleitung (9) am Auslaß der Treibmittel durch eine Muffe (27) gewährleistet wird, die drehbar in einer Halterung (25) der Treibmittel angebracht ist, wobei Drehantriebsmittel (31, 32) verwendet werden, um die Muffe (27) um eine Drehachse (33) zu drehen, die koaxial zu der der Kugelstrahl-Rohrleitung (9) verläuft, wobei diese Drehantriebsmittel der Muffe (27) aus einer Flügelturbine (32) mit senkrechter Drehachse (33), die an der Muffe (27) befestigt ist, und einer dritten Druckluft-Hochdruckleitung (31) bestehen, die tangential zur Drehachse der Turbine gegenüber deren Flügel (32) mündet, um die Kugelstrahl-Rohrleitung (9) und die Ausstoßdüse (20, 21, 22) in umgekehrter Drehrichtung zur Befestigungsrichtung der Muffe zu drehen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Befestigung der Kugelstrahl-Rohrleitung (9) am Auslaß der Treibmittel an der Muffe (27) mit einem verriegelbaren und entriegelbaren Bajonettverschluß (28, 29) gewährleistet wird, um das schnelle Abspannen dieser Kugelstrahl-Rohrleitung (9) zu ermöglichen.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Ausstoßdüse (20, 21, 22) durch Verschrauben zeitweilig an der Kugelstrahl-Rohrleitung (9) befestigt ist, um nach Wunsch auf einfache Weise ansgewechselt werden zu können.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eine Druckschraube (34) verwendet wird, um die Drehbewegung der Flügelturbine (32) zu verlangsamen oder zu blockieren.
  5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Strahlmittel-Versorgungsleitung (7), die beiden zweiten und dritten Druckluft-Hochdruckleitungen (8, 31) bis zu den Treibmitteln mittels einer starren Säule (6) im wesentlichen parallel zueinander gehalten werden.
  6. Vorrichtung nach Anspruch 5, dadurch gekennziechnet, daß sie einen Fuß (4) aufweist, der auf einer Verschiebeachse (4A) eines Granaliengebläses (1) mit waagerechtem Drehteller (2) befestigt ist, wobei auf letzterem ein zu strahlender Turbotriebwerksrotor (10) aufliegt, so daß die Kugelstrahl-Rohrleitung (9) waagerecht liegt und in einen ringförmigen, inneren Hohlraum (11) des Rotors (10) eingeführt werden kann.
EP94402963A 1993-12-22 1994-12-21 Vorrichtung zum Sandstrahlen von Flächen, die von einer geraden Sandstrahlkanalisation nicht zugänglich sind Expired - Lifetime EP0659523B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9315390 1993-12-22
FR9315390A FR2713974B1 (fr) 1993-12-22 1993-12-22 Dispositif de grenaillage de surfaces non accessibles par une canalisation droite.

Publications (2)

Publication Number Publication Date
EP0659523A1 EP0659523A1 (de) 1995-06-28
EP0659523B1 true EP0659523B1 (de) 1999-02-17

Family

ID=9454179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94402963A Expired - Lifetime EP0659523B1 (de) 1993-12-22 1994-12-21 Vorrichtung zum Sandstrahlen von Flächen, die von einer geraden Sandstrahlkanalisation nicht zugänglich sind

Country Status (9)

Country Link
US (1) US5499519A (de)
EP (1) EP0659523B1 (de)
JP (1) JP2732517B2 (de)
CA (1) CA2138612A1 (de)
DE (1) DE69416578T2 (de)
ES (1) ES2127903T3 (de)
FR (1) FR2713974B1 (de)
GR (1) GR3029908T3 (de)
IL (1) IL112078A (de)

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DE59811102D1 (de) * 1998-02-17 2004-05-06 Swiss Caps Rechte & Lizenzen Formwalze und Verfahren zum Bearbeiten von Formwalzen
FR2816538B1 (fr) * 2000-11-16 2003-01-17 Snecma Moteurs Procede pour augmenter la duree de vie des attaches d'aubes sur un rotor
FR2816536B1 (fr) * 2000-11-16 2003-01-17 Snecma Moteurs Procede et dispositif de grenaillage par ultrasons des alveoles "axiales" d'attache des aubes sur un rotor
FR2816537B1 (fr) * 2000-11-16 2003-01-17 Snecma Moteurs Procede et installation de grenaillage par ultrasons des alveoles annulaires d'attache d'aubes sur un rotor
DE10143736C1 (de) * 2001-09-06 2002-08-22 Siemens Ag Verfahren zur Herstellung eines Kraftstoffhochdruckspeichers
EP1555329A1 (de) * 2004-01-15 2005-07-20 Siemens Aktiengesellschaft Bauteil mit Druckeigenspannungen, Verfahren zur Herstellung und Vorrichtung zur Erzeugung von Druckeigenspannungen
DE202005018108U1 (de) * 2005-11-19 2006-01-12 Hammelmann Maschinenfabrik Gmbh Düsenkopf
EP1941967A1 (de) * 2007-01-08 2008-07-09 ALSTOM Technology Ltd Verfahren und Vorrichtung zur Entfernung eines Stifts in engem Raum
US8186419B2 (en) 2008-07-08 2012-05-29 GM Global Technology Operations LLC Method and system for internal cleaning of complex castings
US10062460B2 (en) * 2014-11-26 2018-08-28 Framatome Inc. Control rod device mechanism inner diameter annulus ultra high pressure cavitation peening
DE102019201656A1 (de) 2019-02-08 2020-08-13 MTU Aero Engines AG Verfahren zum glätten einer oberfläche eines bauteils
CN111775064B (zh) * 2020-06-23 2022-03-22 欧盟 一种气动式数控喷丸机
CN111823146B (zh) * 2020-07-16 2023-02-07 芜湖乐维汽车装备设计有限公司 一种汽车金属保险架喷丸架

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Also Published As

Publication number Publication date
US5499519A (en) 1996-03-19
CA2138612A1 (en) 1995-06-23
JPH07251376A (ja) 1995-10-03
IL112078A (en) 1997-08-14
FR2713974B1 (fr) 1996-01-19
IL112078A0 (en) 1995-03-15
DE69416578T2 (de) 2000-01-05
DE69416578D1 (de) 1999-03-25
EP0659523A1 (de) 1995-06-28
FR2713974A1 (fr) 1995-06-23
ES2127903T3 (es) 1999-05-01
JP2732517B2 (ja) 1998-03-30
GR3029908T3 (en) 1999-07-30

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